In Vedic astrology, Manglik Dosha (Mangal Dosha) is considered an important factor in marriage compatibility. If Ridhi Bahl, a Manglik girl, is considering marrying a non-Manglik boy and their compatibility score (presumably out of 36) is 6, this is quite low. Ideally, a score of 18 or above is considered acceptable for a stable marriage.

Here are some things to consider:

1. Low Compatibility Score: A score of 6 out of 36 in Guna Milan (Kundali Matching) indicates major compatibility issues, which could lead to challenges in understanding, communication, and emotional bonding.
2. Manglik Dosha Remedies: Since she is Manglik and her partner is not, potential remedies can be considered, such as Kumbh Vivah, worship of Lord Hanuman, chanting Mangal mantras, or consulting a knowledgeable astrologer for personalized solutions.
3. Stronger Planetary Positions: If the non-Manglik partner has strong Jupiter (Guru), Venus (Shukra), or Moon, it may neutralize some of the negative effects of Manglik Dosha.
4. Exceptions & Cancellations: If the Manglik Dosha is mild (Anshik Manglik), the impact may not be severe. If the Manglik is after 28 years of age, some astrologers believe its effects reduce. If both partners have strong individual horoscopes, the marriage may still work despite low Guna Milan.

Final Verdict:

While marriage is possible, astrological guidance and remedies are strongly advised due to the low compatibility score and Manglik Dosha. If both individuals are emotionally strong and willing to work through challenges, astrology should not be the only deciding factor. Would you like to check for specific remedies or exceptions in their charts?